Eye-motion operable keyboard-accessory

An eye-motion operable keyboard-accessory comprising:

• invisible light-source means disposed in the vicinity and independent of the position of an operator for directing a light ray at an eye of the operator and obtaining a light reflection therefrom;
• a plurality of invisible-light responsive sensors arranged in a keyboard pattern, each of said sensors having an output and being selectively actuable by the operator-reflected light ray, the outputs of said sensors being connectible to a plurality of electrically actuable key means, respectively, for actuation of the key means upon said operator-reflected light ray striking one of said light-responsive sensors, and wherein the key means are disposed on a keyboard, and include at least one mode-key means for changing the operation of the key means from a first mode to a second mode;
• a plurality of indices disposed in the vicinity of said invisible-light responsive sensors and representative of said key means, respectively, for being targetable by said operator-reflected light-ray;
• and
• limb-unaidedly operable confirming means connected to said key means for actuation of the latter only upon operation of said confirming means by the operator.